Brother MFC-8860DN User Manual page 109

Examples of poor print
quality
Hollow print
All black
White Spots on black text
and graphics at 94 mm
(3.7 in.) intervals
Black Spots at 94 mm
(3.7 in.) intervals
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Black toner marks across the
page
Recommendation
Make sure that you use paper that meets our specifications. (See
Acceptable paper and other media
Choose Thick paper mode in the printer driver or in the machine's Paper
Type menu setting, or use thinner paper than you are currently using. (See
Paper Type
on page 17 and Basic tab in the Software User's Guide on the
CD-ROM.)
Check the machine's environment. Conditions such as high humidity can
cause hollow print. (See
Clean the primary corona wire on the drum unit. (See
wire
on page 118.) If the print quality has not improved, put in a new drum unit.
Replacing the drum unit (DR-3117)
(See
Clean the primary corona wire on the drum unit. (See
wire
on page 118.)
The drum unit may be damaged. Put in a new drum unit. (See
drum unit (DR-3117)
Dust, paper powder, glue, or other substances may stick to the surface of the
photosensitive drum (OPC) and cause black or white spots to appear on printed
documents.
Make a few copies of a blank, white sheet of paper. (See
copies
on page 70.)
If you still see the spots on printed documents after making multiple copies, clean
Cleaning the drum unit
the drum unit (see
If the print quality still has not improved you need to install a new drum. (See
Replacing the drum unit (DR-3117)
Make sure that you use paper that meets our specifications. (See
Acceptable paper and other media
If you use label sheets for laser printers, the glue from the sheets may
sometimes stick to the OPC drum surface. Clean the drum unit. (See
Cleaning the drum unit
Do not use paper that has clips or staples because they will scratch the
surface of the drum.
If the unpacked drum unit is in direct sunlight or room light, the unit may be
damaged.
The drum unit may be damaged. Put in a new drum unit. (See
drum unit (DR-3117)
Troubleshooting and routine maintenance
on page 11.)
Choosing a location
on page 82.)
on page 122.)
on page 122.)
on page 118).
on page 122.)
on page 11.)
on page 118.)
on page 122.)
Cleaning the corona
Cleaning the corona
Replacing the
Making multiple
Replacing the
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